Odontalgic device



M. NEGRI ODONTALGIO DEVICE 2 sheds-sheet 1 Filed April-1 9, 1951 I."IJONfo M. NEGRl ODONTALGIC DEVICE June 16, 1953 I 2 Sheets-$11962 FiledApril 9. 1951 Patented June 16, l9 3 UNITED STATES "rer- 3 Claims. 1 Thepresent invention relates to a device for bringing in contact with theinternal surface of theexte'rnal auditory meatus an analgesic fluid foracting on the innervation of the trigeminal' nerve.

According to the invention a vial containing the analgesic fluid isinserted in a protecting containe'i'having a substantiallyfrusto-cohical shape and from the and corresponding to the minor basisof the "fru's t'o-cbiie there projectsa'n absorbent eie'inemus'eutbspread the fluid inside the auditory meatus.

2 tion, "with a needle-shaped projection It, and arcund tni's latter'with a cylindrical flange I2 which surrounds the vial containing theanalforce, owing to the action of the inclined plane of the thread.

The cap may be extended by a handle to facilitate the screwing.

Two preferred forms of embodiment of this invention are shown in theenclosed drawings,

wherein:

Fig. 1 shows an elevational view of the device with the cap on;

Fig. 2 shows a central vertical cross-section of Fig. 1;

Fig. 3 shows a view of a different form of embodiment of the containerand,

Fig. 4 shows thercentral vertical cross-section of the container of Fig.3.

With reference to the drawing:

The form of embodiment shown in Figs. 1 and 2 comprises a frusto-conicalrigid container I, reinforced by ribs 2. The container has at one end acylindrical portion 5 with threads 6, on which the cap I may be screwed.

Inside the container i, absorbent material 8 is placed, formed forinstance bywadding, a part of which is wrapped in a covering 4 made of asheet of gauze, and projects from the end 3 of the container. A vial 9,containing the analgesic fluid, and provided with a rod I6 is arrangedin the container and rests on the wadding, while the rod l6 penetratesinto the wadding 8.

ge'si'c. When the cap I is screwed on the cylindrical part of thecontainer i, the needle H causes the breaking of the vial '9, while thepart I 2 which, owing to the descent of the cap l, surrounds the vial 9,prevents the dissipation of the-fluid outside the container.

The wadding 8 then absorbs the analgesic fluid which through theprojecting part I"? comes out from the container and, owing to thesharpened frusto-conical shape of the element I, can be spread in themost internal part of the external auditory meatus, in order to obtainthe best way the therapeutic efiicacy of the employed prodnot.

The protecting container according to the invention permits easytransportation and easy conservation of the odontalgic device.

As the spherical form for the vial containing the analgesic fluid is thefarm having maximum resistance it requires considerable stress for itsbreaking. Figs. 3 and 4 illustrate a different form of embodiment,wherein this stress may be more easily exerted.

In this case, the part i3 is substantially the same as the correspondingpart described in the preceding embodiment, but the upper part [4,

instead of ending with a plane surface, so that all the screwing stressfor breaking the analgesic vial may be concentrated on its cylindricallateral part, has a projection l5, substantially of a conical shape,allowing the cover to be more easily gripped.-

The device has been shown in Figs. 3 and 4 without the absorbent elementand the vial which are identical in both cases.

I claim:

1. A device for bringing in contact with the internal surface of theexternal auditive canal an analgesic fluid intended to. act on theinnervation of the trigeminal nerve, comprising in combination acontainer provided at one end with a cap and at the other end with anopening, an absorbent material in said container and partiallyprojecting from the opening of said container, a covering of absorbentmaterial wrapping said projecting part of said absorbent material, avial containing the analgesic fluid in said container resting on theabsorbent material, and means in said cap of the container adapted tobreak said vial.

2. A device for bringing in contact with the internal surface of theexternal auditive canal an analgesic fluid intended to act on theinnervation of the trigeminal nerve, comprising in combination a frustoconical container having at one end a cylindrical portion externallythreaded and at the other end an opening, a cap adapted to be screwed onsaid cylindrical threaded portion, a pin integral with said cap andprojecting inside said container, an absorbent material in saidcontainer and partially projecting through the opening thereof, acovering of absorbent material Wrapping said projecting part of saidabsorbent material, a vial containing the analgesic fluid in saidcontainer on said absorbent material, a rod integral with said vial andprojecting therefrom, said rod penetrating into the absorbent material,said vial being in contact with said pin, said pin being adapted tocause breaking of the vial when the cap is screwed on the cylindricalthreaded portion or" the container.

3. A device for bringing in contact with the internal surface of theexternal auditive canal an analgesic fluid intended to act on theinnervation of the trigeminal nerve, comprising in combination a frustoconical container having at one end a cylindrical portion externallythreaded and at the other end an opening, a cap adapted to be screwed onsaid cylindrical threaded portion, a pin integral with said cap andprojecting inside the container, a cylindrical flange projecting fromthe cap and surrounding said pin spaced apart therefrom, an absorbent '4material in said container and partially projecting from said opening ofsaid container, a covering consisting of a sheet of absorbent materialwrapping said projecting part of said absorbent material, saidprojecting part of the absorbent material and said covering beingadapted to penetrate into the external auditive canal, a sealed vialcontaining the analgesic fluid arranged in said container on saidabsorbent material and adapted to partially penetrate in saidcylindrical flange of the cap, a rod integral with the vial andprojecting therefrom which penetrates into the absorbent material, saidvial being in contact with said pin, said pin being adapted to cause thebreaking of the vial when said cap is screwed on the cylindricalthreaded portion of said container, whereby the analgesic fluid.contained in the vial is absorbed by the absorbent material and the saidcovering when the projecting part of the absorbent material and thecovering are introduced into the external auditive canal.

MARIO NEGRI.

References Cited in the file of this patent UNITED STATES PATENTS NumberName 7 Date 217,240 Reichardt July 8, 1879 2,493,416 Negri Jan. 3, 19502,546,848 Bishop Mar. 27, 1951

